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Bluebird's Polly Pocket for boys: pocket-sized playsets shaped like monster heads, each one snapping open on a tiny horror scene and a blond kid in a baseball cap. Doom Zones and Horror Heads — the whole appeal was that something nasty folded shut in your fist.
Thumb-sized figurines inside impossibly small clamshell compacts — you'd flip one open and find an entire world compressed into plastic the size of a mint tin. Invented by Chris Wiggs and made by UK's Bluebird Toys, these collapsible worlds were so addictive that parents had to confiscate them during family road trips.